DE2060593A1 - Closure component tape made of thermoplastic material as well as method and device for producing the same - Google Patents

Description

PATENT LAWYERS

DIPL.PHYS.-ING.H.VON SCHUMANN 2060593

DIPL.CHEM.-ING.W.D. OEDECOVEN

Dresdner Bank AG Some 8 Munich 22, Widenmayertstrasse

Account No. 222300 Telegram address: Protector Munich

Postal Schedckonto: Manchen 49463 Phone 0811-224893

December 9, 1970

2 / D

HEWET GOODMAN LIMITED, Birmingham, UK

Closure component tape made of thermoplastic material as well as method and device for the production of the same ™

The invention relates to a band of non-cutting Closure components made of thermoplastic material. It also has a method of making such a tape and an injection molding machine therefor.

At least with regard to the components of snap fasteners, it is known to connect them to one another to form ribbons, about the storage and the supply of the components to the device for the attachment of the components to any carrier material to facilitate · The components are then severed from the tapes one at a time, as required for use. The components have hitherto been combined to form such bands by heat sealing between the foot sections has provided neighboring components. The heat sealing is carried out as a separate operation after the molding the components carried out, through a high frequency resistor stand welding.

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The object of the invention is to avoid these disadvantages. This is achieved with a band of non-cutting closure components made of thermoplastic material, which according to the invention is characterized in that "with at least two adjacent components produced one after the other a portion of one component is molded onto a portion of the other component. Preferably both of them grip Sections of the two components additionally mechanically interlocking with one another by advantageously adding a section has a bore in which a pin-like projection formed on the other portion engages. This additional form-fitting interlocking ensures a secure Connection even if the two sections mentioned are not complete when the second component is formed merge with each other.

Those sections of the components which are molded onto one another can have the shape of a pin, tongue or any other protrusion which protrudes laterally from the components.

Are the components trunnion pieces or sleeve pieces of a Snap fastener or belonging to other fasteners, for example buttons, then they advantageously have Floor flanges for attachment to girders and hang them together over the floor flanges in the band, the one on top of the other Sections are each formed in one piece with a bottom flange. Is it the components around peg pieces and sleeve pieces of a snap fastener, then each band advantageously has only pin pieces or sleeve pieces.

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Each component of the belt can optionally be formed individually in a separate molding process, with all Components are joined together sequentially to form the tape by placing a section of each component on top of one another Section of the adjacent component is molded. Appropriately, however, the procedure is that in one molding process several components are formed, which are connected by homogeneous, integrally formed webs. A tape according to the invention then has at least two uniform, contiguous molded parts, which are in separate Forming processes are produced and each provided with several interlocking closure components, with a " Terminal component of one molded part with a terminal component of another molded part by being molded onto one another is connected by sections of the two terminal components.

The inventive method for producing such Tapes of closure components made of thermoplastic material is characterized by the fact that a uniform, coherent Molded part with at least one component in a mold cavity, the molded part except for a section the last component is removed from the mold cavity and another uniform, coherent (j Molded part is formed with at least one component in the mold cavity, wherein a portion of the or the first component from the molded part located in the mold cavity in the molten state to the portion of the remaining in the mold cavity previously formed molding is molded.

This cycle can be repeated continuously, so that an uninterrupted band of fastener component moldings from the shape emerges.

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The section of the previously formed molded part remaining in the mold cavity advantageously has such a section Shape on that when molding the section of then formed part on it results in a mechanical, form-fitting connection. In particular, the in the mold cavity remaining portion of the previously formed molded part can be formed with a bore into which the portion is partially molded in from the subsequently formed molded part during molding onto the first section.

In the method according to the invention, the connection of the fastener component moldings to form a tape takes place during the shaping of the individual molded parts one after the other. There are therefore no more operations in the production of the Perform tape than for the production of individual, not united to one another to form a tape closure component moldings would be necessary. The invention also provides The method has the advantage that, in addition to the molding machine, there is no further device for producing the tape of fastener components is required.

When it leaves the molding machine, the tape can be wound onto a reel or roll or otherwise taken up to be able to store it until the individual locking components are used. Instead, however, the tape can also directly to the device for fastening the closure components of the tape are fed to a carrier material.

If the fastener components are pin pieces or sleeve pieces for snap fasteners, then they should preferably be heat-sealable, expediently by means of high-frequency resistance welding of your foot

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parts with a carrier material, For this purpose "consist the components are preferably made of nylon, but another plastic can also be used, for example polyvinyl chloride. Instead, however, the components can also have such foot sections that they are in a different manner and Can be attached to carrier materials, for example by stapling «

An injection molding machine which, according to the invention, is used to carry out the process identified above is characterized by two mutually movable, the mold cavity enclosing mold tools and one between the molds running through the mold cavity, with separate tools movable perpendicular to the tool movement direction with respect to the tools, with brackets for a molded part carrier provided with a molded part formed in the mold cavity, this after each injection molding process is displaceable to the extent that the molded part thus formed remains with a portion in the mold cavity.

The molded part carrier, which runs through the mold cavity, represents part of the mold and thus also determines the final shape of the molded part formed in the mold cavity. Apart from the brackets mentioned, it forms preferably a smooth, flat surface of the mold cavity which provides a smooth, flat surface to those formed in the mold Molded parts come about. As with snap fastener components the surface of the foot part of the or each component formed in a molded part opposite that of the approach of the component-exhibiting side is usually flat or almost flat, it is in the manufacture of these components usually useful, the molded part carrier that part the shape of which this flat surface

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des Fc 'mbeils determined :. However, should the forum on the the side determined by the shaped hatchet have some special form, then the carrier can be profiled accordingly be.

The shaped hatchet is advantageously the carrier of an endless one Conveyor belt formed, which mib a run between runs through the molds, revolves in one direction and with every movement of a woman by a distance slightly shorter than the molded part formed in the mold cavity, the conveyor belt is expedient from steel. The halves can simply be TOn at a distance from each other arranged holes be formed.

In a further improvement of the invention, several B'ormho are used for the simultaneous production of several molded parts hl spaces are arranged in the molds, with a molded part carrier is provided for each cavity,

With VorteLi, a molding tool is fixed to the orb and a molding tool is movably arranged, with the or each Formteilträgsr provided on dome orbsfesten mold is, while the movable mold Ke.rnhülsen and core pins for forming the Gestalb of the closure component molded parts in the or each mold cavity, which are formed to prevent loosening of the in a mold cavity Shaped hatchet from the associated carrier when moving the movable tool away from the stationary tool until it is terminated this away movement remain in contact with the shaped hatchet.

The following are examples of the invention Described hand of the accompanying drawings, for example. Show in it »

ORIGINAL \

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_ ₇ _ 2nd floor ϋ b 9 3

1 shows a view from behind of a tape according to the invention of pin pieces for a snap fastener

FIG. 2 shows the view of the longitudinal section along the line 2-2 in FIG. 1 on a larger scale

Fig. 3 is a rear view of part of a belt of sleeve pieces for a snap fastener in an enlarged reproduction

FIG. 4 shows the view of the longitudinal section along the line 4-4 in FIG. 3i λ

5 shows the view from the front of the band section see Figures 3 and 4i

6 shows a side view of an injection molding machine according to the invention for producing the closure components according to FIGS. 1 to 5 in a schematic representation!

7 shows the front view of the stationary molding tool the machine according to Fig. 6}

Fig. 8 and 9, the upper or lower half of a partially sectioned side view of the two Formwerk- \ tools of the machine according to Figures 6 and 7 in the open state.

FIG. 10 shows the view of the section along the line 10-10 in FIG. 8, but with the molding tools are closed}

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Pig. 11 shows part of the view according to Pig. 10 in ver
larger playback}

12 shows part of the view according to Pig. 9 in enlarged Reproduction.

The one in Pig. 1 to 5 reproduced bands of fastener elements are made of nylon. Each band consists of a series of connected molded parts 1 or 2, which are each formed in a single, separate pinning process and attached to one another at the ends. One tape has only molded parts 1 with pin pieces of a snap fastener, while the other band exclusively is composed of molded parts 2 with sleeve pieces of the snap fastener. Each molded part 1 or 2 is provided with a plurality of journals 3 or sleeve pieces 4 arranged at a distance from one another, with two adjacent Pin pieces 3 and sleeve pieces 4 are connected to one another by a web 5 of the molded part 1 and 2, respectively.

Each pin piece 3 or sleeve piece 4 has a tubular extension 6 with a cylindrical bore 7 "and with
a coaxial, essentially planar, which follows radially
outwardly extending, annular bottom flange 8 of circular outline. On the side facing the approach 6, the bottom flange 8 is outside of the approach 6 with a
beveled annular surface 9 provided, as is particularly clear from Pig. 2 and 4. The bottom flange 8 also has a central one within the associated extension 6
Opening 10 with a diameter smaller than that of the bore 7.

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The Anaatz 6 of each sleeve piece 4- is conical on the outside formed tapering away from the associated bottom flange 8. Furthermore, on the 8 facing away from the bottom flange Mouth of the bore 7 of the extension 6 of each sleeve piece 4 · a Ring of, for example, four spaced apart, arcuate ribs 11 provided, the The mouth of the bore 7 is narrowing.

In the case of the pin pieces 3 to be used with the sleeve pieces 4 - 4 described and shown, the projection 6 is cylindrical on the outside and provided with an outer diameter such that it can pass through the narrowed mouth λ of the bore 7 of a sleeve piece 4. Each pin piece 3 is provided with an outer lip 12 at the end of the projection 6 facing away from the bottom flange 8. The lip 12 protrudes from the extension 6 so far that when a pin piece 3 is inserted into a sleeve piece 4-, the ribs 11 and the portion of the extension 6 having them spring outward from the sleeve piece 4 to allow the lip 12 to pass and then spring back so that the lip 12 is included and the respective pin piece 3 B-it is held in engagement with the associated sleeve piece 4.

The webs 5 of each molded part 1 or 2, which each ^{connect two adjacent pin pieces 3 or sleeve pieces 1} V from the molded part 1 or 2, extend between the bottom flanges 8 of the two pin pieces 3 or sleeve pieces 4 -, are flat and narrower than the outer diameter of the bottom flanges 8. Each web 5 is provided on the side facing away from the lugs 6 of the tenon pieces 3 or the sleeve pieces 4- with a short, central, cylindrical projection 13,

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ORlGiMAL INSPECTED

_ ίο - -

Adjacent molded parts 1 and 2 of each band are connected to one another in that tongues 14 and 15 are formed on one another in the molten state, which tongues 14 and 15 are located on the adjacent ends of the molded parts 1 and 2 radially from the bottom flange β of the terminal one Trunnion 3 or Hülsenstiicks 4 each molded part s 1 and 2 extend away and are thus formed in one piece. After the tongues 14 and 15 have been molded together, they resemble the parts 5 of the molded parts 1 and 2. Each molded part 1 and 2 has a tongue 14 at one end and a tongue 15 at the other end, the tongue 14 on the lugs 6 of the molded part 1 or ?, Facing away from the side provided with a short cylindrical jump 16 before , as can be seen particularly clearly from FIGS. The projection 16 is essentially similar to the projections 13, 13 of the webs 5, but has an axial bore 17 which opens into a shell 18, open at the top, with a U-shaped wall, which is provided in the tongue 14 and faces itself whose free end extends. If the tongue 15 of another adjacent mold Ils 1 or 2 is formed on the tongue 14 provided with the projection 16, then it wedges Ln the axially stepped bore 17 and the slot 18, so that the two tongues 14 and IS are positively locked are connected to each other.

A band consisting of molded parts 1 with different snap fasteners 3 and a band consisting of molded parts 2 Bend over with the snap fastener sleeve. 4 will be at the same time Manufactured in the same SpcLbzgu.Bmasch.Lrie. Such Machine is shown in FIGS. 6-12.

The injection molding machine has a stationary mold 20 and a movable mold 21 which is moved in a known manner. DLe two molding tools

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20 and 21 delimit two parallel mold cavities 22 and 23, as can be seen from FIGS. 10 and 11, the .Formhohlraum 22 forming a unitary mold part 1 with a series of pin pieces 3 and 3 the other cavity 23 each serves to form a molded part 2 with a number of sleeve pieces 4. The stationary mold 20 has an injection nozzle 24 through which liquefied _t Nylon two mold cavities 22 is fed and 23 via a Gießkopfeinrichtung.

Two similar endless steel conveyor belts 27 and 28 extend perpendicularly from the upper to the lower end of the stationary forming tool 20. A portion of each belt 27 "and 28, respectively, runs along the front of the tool 20 ₁ as can be seen in FIG 7 and 11, in terms of depth and width, corresponds to the band 27 and 28, respectively Another mold cavity 23 · Each band 27 or has a series of bores 31 which are provided at the same distance from one another in the middle of each band 27 or 28 over its entire length, on the frame 32 and at the lower or upper end of the tool 20, a pair of transport wheels 35, respectively, are provided around which the ends of the loops of the belts 27 and 28 run adially protruding pins 36, as can be seen from FIGS. 8 and 9, which engage in the bores 31 of the associated band 26 and 27, respectively.

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ORiGiNAL INSPECTED

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According to FIGS. 7 and 9, the two wheels 34 are at the bottom End of the tool 20 rotatably mounted on a common axis 37, which is held by the arms 32 and these opposite is adjustable so that the conveyor wheels 34 to Preventing slagging of the belts 27 and 28 can be moved up and down. The other two conveyor wheels 35 at the upper end of the tool 20 are keyed onto a drive shaft 38 which is rotatably mounted in the arms 33 and is connected to a ratchet wheel 40 via any freewheel mechanism 39 of known construction in such a way that the shaft 38 and thus the conveyor wheels 35 can only rotate in one direction. The ratchet wheel 40 meshes with a Rack 41 reciprocable by a piston 42 provided in a hydraulic cylinder 43 is. In this way, the two conveyor wheels are rotated and the two belts 27 and 28 are rotated simultaneously and intermittently moved in the same direction. The movement of the rack 41 each time the piston is actuated 42 is sufficient to move each belt 27 or 28 to move a distance which is slightly smaller than the length of the associated mold cavity 22 or 23 is.

Friction pads (not shown) provided on the arms 32 act on the two lower conveyor wheels 34 a. They ensure that the wheels 34 are on the axle 37 can only be taken along by the belts 27 and 28, so a movement of the belts 27 and 28 only on the wheels 35 is possible.

As can be seen particularly clearly from FIGS. 8 and 10, the movable molding tool 21 has a front one Extraction plate 44, a rear extraction plate 451, a pouring head extraction plate 46 and a bridge

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plate 47 on. Smooth cylindrical core bits 48 and 49 are held by the rear extraction plate 45. Core sleeves 50 which are coaxial with the pins 48 and which surround them are held by the traction plate 47. These core sleeves 50 are smooth cylindrical and interact with the mold cavity 22 in order to produce the molded parts 1 with the pin pieces 3. To the other pins 49 coaxial with the mold cavity 23 for producing the mold parts 2 with the sleeve pieces 4 and enveloping them, further core sleeves 51 are provided, which are held by the front extraction plate 44. The hern pins 48 and 49 as well as the core sleeves 50 and 51 determine the * bores 7 of the attachments 6 of the pin pieces 3 and sleeve pieces 4, respectively.

The core sleeves 51 assigned to the mold hollow roughness 23 for producing the molded parts 2 with the sleeve pieces 4 each have a sing of arc-shaped recesses 52 arranged at a distance from one another, namely in the outer surface and in the vicinity of the front end, around the ribs 11 in to form the bores 7 of the sleeve bridge 4. Each core pin 48 or 49 has a short, front ifcid section 53 of reduced diameter, which serves to form the central opening 10 in the bottom flange 8 of a pin piece 3 or sleeve piece 4. Each of the | The core sleeves 50 associated with the mold cavity 22 are surrounded by an outer sleeve which is held by the front extraction plate 44. These sleeves 5 ^ · are each designed in the vicinity of their front end on the inside so that they bring out the outer shape of the lugs 6 of the pin pieces 3, including the outer lips 12 thereon. As can be seen from FIG. 11, they are slidably mounted in bores 55 * of a molding belt 55 from the movable molding tool 21.

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Each bore 55 'of the band 55 is on that of the front surface of the band 55 adjacent end formed so that together with the front face of the associated tlusseiihiilse 5 ^ · the beveled front annular surface 9 of the bottom flange 8 of a journal piece 3 is formed.

The tool 21 also has a sleeve piece molding band 56 with a bore 56 ′, in which the core sleeves 51 assigned to the mold cavity 23 are slidably mounted. Each bore 56 'of the band 56 is designed on the inside at the front end in such a way that the conical outer shape of the extension 6 of a Hülsensbücks 4 is formed. The front surface of the band 56 is designed around the end of each Bohmng 56 'so that the beveled front annular surface 9 of the bottom flange i> of a sleeve piece 4 is formed.

The Kertiati L "!; O 48 and ' ^L 9 and the associated core sleeves 50 or 51 and the outer sleeves 54 are mutually movable at different points of the movement of the tool 21 relative to the tool 20 in a manner to be described below.

From the plate 46 ejector pins 57 and a rod 53 with animals are held, which is cut out at the front end in accordance with If ¹ Ig. S one groove 59 with the size of half a dovetail froi to let. The extraction plate 46 is attached to the front end of an ejector shaft 60.

The movable mold is used with every injection molding process 21 applied to the or ta fixed molding tool 20 .. How 8, 9 and 10 can be seen, the closed Tools 20 and 21 with each other by means of pawls 61 and 61 '

109825 / 0Q56 ORiGiNAL inspected

-15- 2060033

locked, which are pivotably mounted on opposite sides of the tool 20 and when the tool 21 moves towards the tool 20 in engagement with retaining projections 62 on tension members 63 and 63 ^! be swiveled. The tension members 65 are rigidly connected to the plate 4-5, the tension members 65 'with the plate 44. The pawls 61 and 61' are moved by stop plates 64, 64 'around the movable tool 21 in engagement with the projections 62. The stop plates 64, 64 ^l hold the pawls 61, 61 * in engagement with the projections 62. The pawls 61, 61 'are provided in pairs arranged one above the other, and there are two such pairs on each side of the tool 20. The tension members 65, 63 'and the stop plates 64, 64' are also in the form of pairs arranged one above the other.

The arrangement is such that according to the above Part of Fig. 8, the engagement of a pawl 61 of each pair with the projection 62 of the associated tension member 63 just before Engagement of the other pawl 61 '(shown below in Fig. 8) each pair occurs with the projection 62 of the associated tension member 63 'during the closing movement of the tool 21. When the tool 21 is moved away from the tool 20, the pawls 61 and 61 'disengage in the reverse order with the associated tension members 63 and 63 '· I

When the movable mold 21 sets against the stationary mold 20, then an inclined surface comes 66 to a forwardly projecting nose 67 at the bottom of the movable mold 21 on a sloped surface 68 at one end of a carriage 69 for abutment which _f in the lower part of the stationary mold 20 is housed, as can be seen from Fig. 9, and moves the carriage 69 vertically upwards, parallel to the front surface

, a982S / 005 6 _{ofi] G | NAL}

before from tool 20. A sloping surface is laid down at the other end of the carriage 69 to an inclined surface 71 a sliding block 72, which is also in the stationary Tool 20 is housed. This has a horizontal displacement of the slide block 72 perpendicular to the front surface of the stationary Formwej? kzeug 20 result, so that two sliding Core pins 73ι of which only one is visible in the drawings is, and which are provided on the slide block 72, from the Front surface are pushed out of the stationary molding tool 20, one opposite one of the two belts 27 and. 28. When moving the slide block 72 to advance of the core pins 73, another inclined surface 74 of the block 72 comes to rest on an inclined surface 75, which is provided at one end of a pawl 76 slidably mounted in the stationary mold 20, which then slides vertically downward and protrudes from the bottom surface of the stationary molding tool 20, specifically next to the nose 67 in the movable molding tool 21 in order to be in a groove 77 cle ^ nose to intervene.

As can be seen particularly clearly from FIG. 12, each sliding core pin 73 has an end section 78 with a reduced diameter which, when the respective pin 73 is advanced, penetrates with play into one of the bores 31 of the band 27 or 28, namely into one of the bores 31 in that part of the respective mold cavity 22 or 23 in which the tongue 14 is formed at one end of each molded part 1 or 2 during injection molding of the molded part 1 or 2. As already mentioned, this tongue 14 has a cylindrical projection 16 with a stepped bore 17 and slot 18. The end of the core pin 73 is used to form the bore 17. The movable mold 21 is on that part of the mold cavity 22, 23 in which the tongue 14 is formed,

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designed so that the slot 18 and the reduced diameter portion of the bore 17 »which in the slot 18 passes over, are formed

The sliding core pins 73 can also be advanced in any other suitable manner.

BFach the closing of the tools 20 and 21 a certain amount of liquefied nylon in the mold cavities 22 and 23 is injected and allowed to cool so that the same two uniform form parts 1 and 2 occur · bit of nylon occurs also in the holes 31 in those parts of the * tapes 27 and 28, which pass through the mold cavities 22 and 23, respectively, and solidifies therein, so that the short cylindrical projections 13 are formed on the rear side of the mold parts 1 and 2, which wedge them with the bands 27 and 28 · As described , the two sliding core pins 73 form the bores 17 in the projections 16, which are each formed at one end of the mold axes 1 and 2 in the bores 31 of the bands 27 and 28, into which the pins 73 are advanced,

The movable molding tool 21 or its frame

is then moved away from the stationary molding tool 20, and | although with the release of molded parts 1 and 2. These are not pulled away as they are being pressed against the ribbons 27 and 28 by the core pins 48 and 49 and the core sleeves 511 which is assigned to the molded part 2 with sleeve pieces 4 are, furthermore by the outer sleeves 54. All these components remain with the initial movements of the tool 21 or its frame stationary. The shaping strips 55 and 56 and the core sleeves 50, which are assigned to the shaped hatchet 1 with pin pieces 3 and connected to the plate 47 move

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with the tool 21 or, whose frames are from the shaped hatchets 1 and 2 away.

The Gleükopfsys solidified between the two Forming hatchets 1 and 2 Lsb mLb the movable Lohen forming tool 21 wedged, due to the connection of part of the Sysbems with. the groove 59 at the end of the rod 58 · The system moves therefore with the tool 21 and is on this V / eLse from the formsL.Len 1 and?. separated,

When the tool 21 is opened, its nose 67 moves the pawl ^r / £> due to the interaction of the inclined surfaces on the pawl '/ 6 and the hub 77 in the nose 67 vertically upwards back into the stationary tool 20, so that the inclined surface 75 ^ en locking pawl 76 moves the sliding block 72 and the sliding core pins 73 back from the shaped hatchets 1 and 2, ϋ ·; · ΐ. · Glelbkloba 72 continues to move do η slide 1 ^:) vertically downwards back into the coating that was occupied before the tool 21 was placed on the tool 20.

As soon as the tool 21 moves a certain distance from the tool 20 wag üü'vogt; the stop plates 64 ¹ , which move with the V / Erk ^ oug 21, run free from the pawls 61 ', which are out of engagement with the projections. 62 of the tension members 63 'swing, once the pawls B'l' are free, the front extract LonspLabta ΊΛ begins with; where the tension members 63 ^{1 are} connected, likewise with the movable molding tool 21 b? .w, whose frame is to run with it. The friction between the plate ^; MI- and TeLLan de.3 movable tool 21 is sufficient to ensure that the plate - '^ I- is taken along with the tool 21 as soon as the tension members 65' and the pawls 61 are disengaged, the backward movement of the

10 9 8 2 5 / OQSß ORiGiNAL INSPECTED

2060633

front Extraktionüplaitο HA 3iat retraction of the core sleeve 51 and the newly A.ußenhül ^{l} l} \ ans the molding 1 or "2 result. The core pins HB and 49 hold the forrate parts 1 and 2 tightly to the ligaments 2? and. 28, while the sleeves 51 and 54 run back.

When the movable molding tool 21 moves backwards, the other AnIaufpl ei: th 64, which also move with the tool 21, out of engagement with the pawls 61, which then "swing away from the projections 62 of the other tension members 63. Then begins the rear extraction plate 45 having the tension members 65 to move back with the movable mold 21, again due to sufficient friction between the plate 45 and parts of the tool 21. The core pins 48 and 49 are pulled out of contact with the mold parts 1 and 2. Since the ends of the pins 48 and 49 are smoothly cylindrical and only pass through the bottom flanges 8 of the pin pieces 3 or sleeve pieces 4 of the molded parts 1 and 2, they easily run out of the molded parts 1 and 2 without pulling on them, or only slightly, so that a pulling off of the molded parts 1 and 2 from the belts 27 and 28 is not to be feared.

At the end of the backward movement of the tool 21 runs the ejector shaft 60, which previously moved with the tool 21 has moved against a stop, not shown, so that a further backward movement of the shaft 60 and thus the ejector plate 46 with the tool 21 is excluded. Also the movement of the pins 57 and the rod 58, which are attached to the Plate 46 is provided, ceases. During the further backward movement of the tool 21, the front ends of the run Pins 57 and rod 58 from the face of the tool

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ORIGINAL INSPECTED

20 6 0 5 3

21 out, so that the watering head system from the movable mold 21 is repelled and falls away.

Are all sleeves 50, 51 and 54 and pins 48 as well 49 pulled out of the mold parts 1 and 2, and the pouring head system is also repelled from the movable mold 21, then the hydraulic cylinder 43 is actuated so that the piston 42 moves the toothed rack 4-1 and the conveyor wheels 35 pull the belts 27 and 28 upwards · thereby convey the bands 27 and 28, the molded parts 1 and 2, which are wedged on them, up and out of the end face of the stationary mold 20 out, but the tongues 14 at the rear end of each molded part 1 and 2 in the mold 20 remain. These tongues 14 are at the end of the upward movement the mold parts 1 and 2 in such a position that when the mold is closed again 21 and of the mold 20 for the next injection molding process, the tongues 14 - in those parts of the two mold cavities 22 and 23 are where the tongues 15 at the front ends of the Moldings 1 and 2 to be formed arise.

The tongues 15 are formed in their training in the molten state itself on the tongues 14 of the molded parts 1 and 2 formed in the preceding injection molding process so that the molded parts 1 and 2 are combined to form a band in the manner shown in FIGS. Nylon of the tongues 15 also runs into the bores 17 and slots 18 of the tongues 14 and solidifies therein, so that the tongues 14 and 15 are not only formed together, but also are positively connected to each other.

In this way, many molded parts 1 and 2 are successively connected with the molded parts 1 or

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formed together so that two uninterrupted bands of mutually connected, successive molded parts 1 or 2 emerge from the mold cavities 22 and 23.

As can be seen from FIGS. 7 and 8, is immediate A pick-up 80 is provided below the upper conveyor wheels 35, which the molded parts 1 and 2 of each belt separates from the belts 27 and 28 as they are moved away from the dies 20 and 21.

According to Fig. 6, the two bands of molded * len 1 or 2 after they have been separated from the conveyor belts 27 and 28 guided over rollers 81 and feed rollers 82, the latter being driven by an electric motor (not shown) are. The belts then run to an automatic test and measuring device 83 to detect errors on the trunnion pieces 3 or sleeve pieces 4 of the bands to be determined If one is determined, then immediately an interruption of the drive of the rollers 82 via a switch, so that the advance of the There is no ligament. At the same time an alarm is given to make the operating personnel aware of the faulty Cut the pin piece 3 or sleeve piece 4 from the respective band and weld it back together again. | The cutting and welding is done with help of the combined cutting and welding device 84 (Fig. 6). Thereafter run the two bands through a counter 85 arbitrary Type, which the pin pieces 3 or sleeve pieces 4 of each band automatically counts and after the passage of a A certain number of actuated a cutting device 86, which cuts the respective tape. The tapes are on spools 87 wrapped. The counter 85 actuates the cutting device 86 after such a number of trunnion pieces have passed through

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3 or sleeve pieces 4, which corresponds to a full bobbin 87. When the cutting device 86 is operated, a another alarm is given to indicate to the operator that the bobbins 87 must be changed.

Me rollers 81 are therefore provided to a certain degree Period of time between the tenon pieces running out

3 or sleeve pieces 4 from the tools 20 and 21 and the reaching of the feed rollers 82 are available, see above that the following operations, which the tapes are subjected to before reaching the reels 87, are not affected the injection molding operations of the injection molding machine can be carried out. The filled bobbins 87 can without stopping the injection molding machine must be replaced.

Details of the hydraulic and electrical circuit for actuating and controlling the injection molding machine described are not described and illustrated since they are clear to those skilled in the art under the given conditions.

When separating the trunnion pieces 3 or sleeve pieces

4 of the bands described, the webs 5 are between the bottom flanges 8 of adjacent trunnion pieces 3 or sleeve pieces 4 of the molded parts 1 and 2 and the connected tongues and 15 adjacent molded parts 1 and 2 respectively cut away so that the bottom flange 8 of each pin piece 3 or sleeve piece 4 has a completely circular outline.

The injection molding machine described and shown can also be modified so that uninterrupted bands can be produced from components of fasteners other than a snap fastener. For example, could the machine for the production of continuous strips of

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Footboards and even headboards of such two-part buttons can be used, which are disclosed in British patent application Mr, 4-25 ^ 2/69 are disclosed. It may be necessary be the bands 27 and 28 against other bands to replace which retaining provisions and / or profiled surfaces that have the shape of the produce are adapted to the moldings.

Tapes according to the invention can optionally be components have for hook and eye closures, the method according to the invention being used for their production, and one Injection molding machine according to the invention can be used.

109825/0056

Claims (1)

Expectations 1J tape made of non-cutting fastener components thermoplastic material, characterized in that at least two adjacent, produced one after the other Components (3 $ 4) a section (15) of one component (3j 4) is molded onto a section (14) of the other component (35 4). 2. Tape according to claim 1, characterized in that the two sections (14 and 15) of the two components (3> 4) also interlock mechanically in a form-fitting manner 3. Tape according to claim 2, characterized in that a section (14) has a bore (17) into which a peg-like projection formed on the other section (15) engages. 4. Band according to one of claims 1 to 3j, characterized in that that the components (3 »4) have floor flanges (8) for attachment to beams and over the floor flanges (8) are related in the band, each section (14) and each section (15) being integral with a bottom flange (8) is formed. 5. Tape according to one of claims 1 to 4, characterized in that several components (3 | 4) together and with Struts (5) are formed which each connect two adjacent components (3i 4). 6. A method for producing a tape of closure components made of thermoplastic material according to one of the 109825/0056 Claims 1 to 5 »characterized in that a uniform, coherent molded part (1; 2) with at least a component (3; 4) formed in an iOrmhohlraum (22 | 23), the molded part (1; 2) except for a section (14) of the or the last component (3J 4) from the mold cavity (22; 23) removed and another uniform, coherent molded part (1; 2) with at least one component (3 $ is formed in the mold cavity (22 $ 23), a section (15) of the or · the first component (3 »4) from the im Mold cavity (22; 23) located mold part (1; 2) in molten State, on the portion (14) of the previously formed molded part (1; 2) is molded 7 · "Method according to claim 6, characterized in that the section (14) of the previously formed molded part (1; 2) remaining in the mold cavity (22; 23) has such a shape has that when molding the section (15) from subsequently formed molded part (1; 2) on it results in a mechanical, form-fitting connection 8. The method according to claim 7, characterized in that the section (14) of the previously formed molded part (1; 2) with a bore that remains in the mold cavity (22; 23) (17) is formed, in which the section (15) from subsequently formed molded part (1; 2) is partially molded onto the section (14) during molding. 9e injection molding machine for performing the method according to one of claims 6 to 8, characterized by two mutually movable mold tools (20 and 21) enclosing the mold cavity (22; 23) and one between the mold tools (20 and 21) through the mold cavity (22; 23) 109825/0058 2 O G U -, J 3 running, with separate tools (20 and 21) perpendicular to the tool movement direction opposite the tools (20 and 21) movable, provided with holders (31) for a molded part (1} 2) formed in the mold cavity (22; 23) Molded part carrier (27; 28), this being displaceable after each injection molding process to such an extent that what is formed in the process Molded part (1; 2) remains with a section (14) in the mold cavity (22; 23). 10. Injection molding machine according to claim 9 »characterized in that that the molded part carrier is formed by an endless conveyor belt (27; 28) which has a run between the Forming tools (20 and 21) passes through, rotates intermittently in one direction and with each further movement around a distance slightly shorter than the molded part (1; 2) formed in the mold cavity (22; 23) continues. 11. Injection molding machine according to claim 9 or 10, characterized in that that the molded part carrier (27; 28) has a smooth, forms flat surface of the mold cavity (22; 23). 12. Injection molding machine according to claim 9> 10 or 11, characterized characterized in that for the simultaneous production of several molded parts (1; 2) several mold cavities (22; 23) in the Forming tools (20 and 21) are arranged, with a Formfceilträger (27; 28) are provided for each cavity (22 or 23) is. 13. Injection molding machine according to one of Claims 9 to 12, characterized in that a molding tool (20) is stationary and a molding tool (21) is movably arranged, the or each mold shim carrier (27; 28) on the stationary Forming tool (20) is provided while the movable 109925/0056 ORiGINAL INSPECTED Molding Tool (21) Core Sleeves (50} 51 $ 5 ^) and Core Pins (48i 49) for forming the shape of the locking component molded parts (1 $ 2) in the or each form honing space (22 or 23) which, in order to prevent the loosening of the molded part (1; 2) formed in a mold cavity (22; 25) from the associated carrier (27 $ 28) when moving the movable tool (21) from the stationary tool (20) to to end this movement away from the molded part (I; 2) remain in contact. 109825/0056